Double-column swinging bridge pier structure using TMD seismic absorption measure

Abstract

The invention provides a double-column swinging bridge pier structure using a TMD seismic absorption measure and relates to the technical field of bridge construction seismic mitigation and absorption. A double-column swinging bridge pier construction method using the TMD seismic absorption measure comprises a bridge pier-bearing platform swinging structure, a bridge pier-upper structure swingingstructure and the TMD seismic absorption measure in an upper structure box room. No connection measure is available between an upper structure and bridge piers and between the bridge piers and bearingplatforms. Top segments and bottom segments of the bridge piers are expanded rectangular sections; and cuboid-shaped rubber blocks are arranged at the foot parts so as to prevent swinging interfacesfrom being damaged and destroyed due to local compression and collision. Anti-shear hollow steel pipes are arranged at the tops of the bridge pier and the bearing platform to limit the sliding of thebridge pier. The TMD seismic absorption measure consists of rolling shaft supports and counterweights to realize a function of absorbing seismic energy. According to the double-column swinging bridgepier structure using the TMD seismic absorption measure, the bridge pier swings to release bending moments at the top and bottom of a pier, and plastic deformation is concentrated on the rubber blockto absorb the seismic energy by using the TMD measure; and therefore, a bridge structure realizes good anti-seismic property and post-earthquake recovery capacity.

Description

technical field [0001] The invention relates to the technical field of vibration reduction and isolation of bridge engineering, in particular to a double-column swinging bridge pier adopting TMD vibration reduction measures with small damage and easy repair. Background technique [0002] my country is located between the circum-Pacific seismic belt and the Eurasian seismic belt. Most of the country is an earthquake zone, especially the western part of my country is mostly a strong earthquake zone with frequent seismic activities. The bridge is a pivotal project of the traffic lifeline, and its construction cost is high. Once it is damaged by an earthquake, it will cause huge economic losses, and it is extremely difficult to repair after the earthquake. The number of casualties directly on the bridge was not many, but the economic losses and casualties caused by the damage and interruption of traffic lifelines were immeasurable, resulting in rescue personnel not being in plac...

AI Technical Summary

Problems solved by technology

The bridge is a pivotal project of the traffic lifeline, and its construction cost is high. Once it is damaged by an earthquake, it will cause huge economic losses, and it is extremely difficult to repair after the earthquake

The number of casualties directly on the bridge is not many, but the economic losses and casualties caused by the damage and interruption of the traffic lifeline are immeasurable, resulting in the failure of rescue personnel to arrive in time, and many people have aggravated the earthquake disaster because they did not receive timely rescue.

At the same time, it is difficult to repair the damaged large bridges, which seriously affects the production and life in the disaster area and the post-disaster reconstruction work

The current seismic design of bridges is mainly based on the ductile seismic design of the hysteretic performance of reinforced concrete piers, but it is difficult to repair the damage and destruction of the plastic hinge area of ​​bridge piers

For medium-short bridge piers in high-intensity areas, it is not economical to rely solely on increasing the cross-section, and it is difficult to guarantee the ductility.

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